Identification of twig blight pathogens of Myrica rubra and analysis on soil nutrient contents in Yunnan Province

doi:10.3969/j.issn.1004-1524.2017.02.13

›› 2017, Vol. 29 ›› Issue (2): 270-276.DOI: 10.3969/j.issn.1004-1524.2017.02.13

• Plant Protection • Previous Articles Next Articles

Identification of twig blight pathogens of Myrica rubra and analysis on soil nutrient contents in Yunnan Province

WU Yangchun^{1, 2}, REN Haiying², QI Xingjiang^{2, *}, ZHENG Xiliang², LIANG Senmiao²

1. College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China;
2. Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2016-07-25 Online:2017-02-15 Published:2017-03-06

Abstract

Abstract: In order to clarify the cause of bayberry twig blight in Yunnan Provinces pathogens were isolated and identified by Koch's rule, morphology and rDNA-ITS sequences. The soil nutrient contents of diseased planting-stocks, diseased container seedlings, healthy container seedlings and native healthy bayberry trees were tested. The results showed that the pathogens were identified as Pestalotiopsis versicolor. The contents of phosphorus, boron, potassium, calcium and zinc in diseased planting-stocks significantly increased with 55.8%-511.5% and nitrogen increased with 9.2%, compared with the healthy planting-stocks, which meaned that the planting-stocks grew in the rich-nutrient soil. In addition, compared with the natively healthy bayberry trees, phosphorus and potassium in the diseased container seedlings were significantly increased with 203.2% and 431.6%, respectively, magnesium increased with 27.6%, other nutrient contents were all decreased, with 28.6%-96.9%, which indicated that nutrient contents in container seedlings soil were imbalance. The results of this study provided important base for bayberry disease prevention and control in Yunnan Province.

Key words: Myrica rubra, twig blight, pathogen, Pestalotiopsis versicolor, soil nutrient content

CLC Number:

S667.6

WU Yangchun, REN Haiying, QI Xingjiang, ZHENG Xiliang, LIANG Senmiao. Identification of twig blight pathogens of Myrica rubra and analysis on soil nutrient contents in Yunnan Province[J]. , 2017, 29(2): 270-276.

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Identification of twig blight pathogens of Myrica rubra and analysis on soil nutrient contents in Yunnan Province

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